php三种实现多线程类似的方法

发布时间：2020-12-12 21:08:39 所属栏目：PHP教程来源：网络整理

导读：1、curl_multi方法当需要多线程的时候，可以用curl_multi一次性请求多个操作来完成，但curl走的是网络通信，效率与可靠性就比较差了的。 $sql = "select waybill_id,order_id from waybill where status40 order by update_time desc limit 10 "; $data = Y

1、curl_multi方法

当需要多线程的时候，可以用curl_multi一次性请求多个操作来完成，但curl走的是网络通信，效率与可靠性就比较差了的。

$sql = "select waybill_id,order_id from waybill where status>40 order by update_time desc limit 10 ";

$data = Yii::app()->db->createCommand($sql)->queryAll(); //yii 框架格式 

foreach ($data as $k => $v) {  

  if ($k % 2 == 0) { //偶数发一个网址 

    $send_data[$k]['url'] = ''; 

    $send_data[$k]['body'] = $v['waybill_id']; 

  } else { //奇数发送另外一个网址 
    $send_data[$k]['url'] = 'http://www.abc.com'; 

    $send_data[$k]['body']=array($v['order_id'] => array('extra' => 16)); 

  } 

} 

$back_data =sendMulitRequest($send_data); 

var_dump($back_data);

}
function sendMulitRequest($send_data){
$params = array();
$curl = $text = array();
$handle = curl_multi_init();

foreach ($data as $k => $v) { 

  if (empty($v['url'])) { 

    $v['url'] = "http://www.xxx.com"; //if url is empty,set defalut url 

  } 

  $reqBody = json_encode($v['body']); 

  $reqStream = array( 

    'body' => $reqBody,);  
  $encRequest = base64_encode(json_encode($reqStream));  
  $params['data'] = $encRequest; 
  $curl[$k] = curl_init(); 
  curl_setopt($curl[$k],CURLOPT_URL,$v['url']); 
  curl_setopt($curl[$k],CURLOPT_POST,TRUE); 
  curl_setopt($curl[$k],CURLOPT_HEADER,0); 
  curl_setopt($curl[$k],CURLOPT_POSTFIELDS,http_build_query($params)); 
  curl_setopt($curl[$k],CURLOPT_RETURNTRANSFER,1); 
  curl_multi_add_handle($handle,$curl[$k]); 
} 
$active = null; 

do { 

  $mrc = curl_multi_exec($handle,$active); 

} while ($mrc == CURLM_CALL_MULTI_PERFORM); 
while ($active && $mrc == CURLM_OK) { 

  if (curl_multi_select($handle) != -1) { 

    do { 

      $mrc = curl_multi_exec($handle,$active); 

    } while ($mrc == CURLM_CALL_MULTI_PERFORM); 

  } 

} 
foreach ($curl as $k => $v) {  
  if (curl_error($curl[$k]) == "") { 
    $text[$k] = (string) curl_multi_getcontent($curl[$k]); 
   }  
  curl_multi_remove_handle($handle,$curl[$k]);  
  curl_close($curl[$k]); 
} 
curl_multi_close($handle);  
return $text;

}

2、通过stream_socket_client 方式

echo $english_format_number;  
exit(); 
$timeout = 10; 
$result = array(); 
$sockets = array(); 
$convenient_read_block = 8192; 
$host = "test.local.com"; 
$sql = "select waybill_id,order_id from xm_waybill where status>40 order by update_time desc limit 1 ";  
$data = Yii::app()->db->createCommand($sql)->queryAll(); 
$id = 0; 

foreach ($data as $k => $v) { 
  if ($k % 2 == 0) { 
    $send_data[$k]['body'] = NoticeOrder::getSendData($v['waybill_id']); 

  } else { 
    $send_data[$k]['body'] = array($v['order_id'] => array('extra' => 16));  
  }  
  $data = json_encode($send_data[$k]['body']); 
  $s = stream_socket_client($host . ":80",$errno,$errstr,$timeout,STREAM_CLIENT_ASYNC_CONNECT | STREAM_CLIENT_CONNECT); 
  if ($s) {  
    $sockets[$id++] = $s; 
    $http_message = "GET /php/test.php?data=" . $data . " HTTP/1.0rnHost:" . $host . "rnrn";  
    fwrite($s,$http_message); 
  } else {  
    echo "Stream " . $id . " failed to open correctly."; 
  }  
} 

while (count($sockets)) { 

  $read = $sockets; 

  stream_select($read,$w = null,$e = null,$timeout); 
   if (count($read)) {  
    /* stream_select generally shuffles $read,so we need to 
     compute from which socket(s) we're reading. */ 
    foreach ($read as $r) { 

      $id = array_search($r,$sockets); 
      $data = fread($r,$convenient_read_block); 
      if (strlen($data) == 0) { 
        echo "Stream " . $id . " closes at " . date('h:i:s') . ".<br>  "; 
        fclose($r); 
         unset($sockets[$id]); 
      } else { 
        $result[$id] = $data; 
      } 
    } 
  } else {  
    /* A time-out means that *all* streams have failed 
     to receive a response. */ 
    echo "Time-out!n"; 
    break; 
  }  
}  
print_r($result);

}

3、通过多进程代替多线程

  static $num=0; 
  $num++; 
  if($num>=$number){ 
    //当进程数量达到一定数量时候，就对子进程进行回收。 
    pcntl_wait($status); 

    $num--; 
  }  
}else{ //为0 则代表是子进程创建的，则直接进入工作状态 

  if(function_exists($func_name)){ 
    while (true) { 
      $ppid=posix_getpid(); 
      var_dump($ppid); 
      call_user_func_array($func_name,$args); 
      sleep(2); 
    } 
  }else{ 
    echo "function is not exists"; 
  } 
  exit();   
}

}
}
function worker($args){
//do something

}
daemon('worker',array(1),2);

以上就是为大家分享的三种php实现多线程类似的方法，希望对大家的学习有所帮助。

（编辑：李大同）

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